Apparatus for dyeing skeins of yarn

ABSTRACT

An apparatus for dyeing skeins of yarn in which the skeins are suspended on bars formed as circle involutes.

United States Patent Nielsen 1 June 20, 1972 [54] APPARATUS FOR DYEINGSKEINS OF YARN [72] Inventor: Hans Nielsen, Reinach, Switzerland [73]Assignee: Vald. Henriksen A/S, Soborg, Denmark [22] Filed: Jan. 14, 1971[2]] Appl. No.1 106,363

[30] Fureign Application Priority Data Jan. 15, 1970 Denmark ..l72/7O[52] U.S. Cl ..68/l88 [51] Int. Cl ....B05c 8/02 [58] Field ofSearch..68/l49,l59,l60, 161,162,

[56] References Cited FOREIGN PATENTS OR APPLICATIONS 668,018 3/1952Great Britain ..68/l88 Primary Examiner-William 1. PriceAttorney-Waters, Roditi. Schwartz & Nissen [57] ABSTRACT An apparatusfor dyeing skeins of yarn in which the skeins are suspended on barsformed as circle involutes.

4 Claims, 1 Drawing figure APPARATUS FOR DYEING SKEINS OF YARN Thepresent invention relates to an apparatus for dyeing skeins of yarn. Theapparatus is of the kind consisting of a preferably cylindricalcontainer with a cross-section of radial symmetry in which there isprovided a loose frame for yarn bars on which the yarn may be hung andwhich is provided with means for circulating the dye.

The known apparatus of this kind, for example that disclosed in DanishPat. No. 73,417, have been highly efiective in regard to producing auniform and homogenous dyeing of the yarn, but since the frame for theyarn bars is designed in such manner that the bars are located centrallyaround a propeller and therefore are of circular arc form in thestructurally most convenient embodiment of the apparatus, which has acylindrical container, they are less suitable for dyeing certain newertypes of yarn manufactured in larger skeins than previously used. Owingto the large skeins, it is, in fact, impossible to utilize the fulllength of the bars, more particularly when the bars are of short length,since the length cannot be a multiple of the width of the large skeins.The skeins have therefore either to be compressed or to hang spacedapart, by which the apparatus is unevenly packed with yarn, which,again, involves uneven dyeing of it.

This drawback is relieved by means of the apparatus according to theinvention, the essential feature of which is that the yarn bars aredesigned as circle involutes and placed in the frame of yarn bars insuch manner as to extend from the center of the container towards thewall of the container.

As a result, the bars may be made longer than in the known apparatus, sothat they may be brought to conform to an integral number of largeskeins, and, if all the bars are identical, simultaneously withpreserving the possibility of filling out the container space with yarnequally uniform as when the bars are designed as concentric circulararcs. As a result, the capacity of the apparatus may be fully utilized,also for dyeing large skeins, without impairing the homogenous anduniform dyeing.

To permit skeins to be hung on the bars, the bars have to be placed inthe frame in such manner that they are either removable or detachable atleast at one end. According to the invention the bars may appropriatelybe attached to the frame at the end pointing towards the central part ofthe apparatus. As a result, it will be possible to make the frame forthe bars of a very simple form as it may consist of a tubular memberonly, adapted to be arranged centrally in the container above apropeller provided at the bottom of same, the other end of the barsbeing simultaneously free for removal and suspension of skeins as soonas the frame is lifted out of the container.

In this embodiment the bars according to the invention are preferablypivotally attached to the frame, for example by means of a hinge, sothat they may be turned away from each other, thus facilitating theremoval and the suspension of the skeins.

Since such freely pivotal bars will be liable to adopt a position in thecontainer as nearly "radial" as possible, the free ends of the bars may,if necessary, be provided with means keeping them at a definite distancefrom the container wall so as to avoid that the bars wedge the outerskeins against the container wall, or the bars may be pivotally attachedto the frame by means of hinges which may be locked in such positionthat the free ends of the bars do not reach the container wall.

In another advantageous embodiment according to the invention the barsare detachable.

The apparatus may similarly as the known apparatus have either a singleset of bars on which the skeins are freely suspended, or two sets ofbars, each passing through its separate ends of the skeins and keepingthem extended. The latter embodiment is more suitable for most kinds ofyarn and has further the advantage that the direction of circulation ofthe dye is immaterial.

The invention is further illustrated in the drawing, which is aschematic representation of a part of a yam dyeing apparatus accordingto the invention, viewed from above.

The apparatus consists of a cylindrical container 1 at the bottom ofwhich there is a propeller 2 for circulating the dye. A frame 3 for thebars is provided centrally in the container 1 in the form of a tube,yarn bars 4 curved like circle involutes being pivotally attached toflanges of the frame 3 by means of hinges 5. The free end of the yarnbars is provided with a distance member 6 to prevent the end of the barand consequently the skein hanging at the extreme end from being wedgedagainst the inner wall of the container. When all the bars similar tothe embodiment shown in the drawing are formed in accordance with thesame circle involute the identical distance between the skeins suspendedwill be provided everywhere in the annular space between the frame 3 andthe container 1 and consequently the said space will be uniformly filledout.

I claim:

1. An apparatus for dyeing skeins of yarn, consisting of a preferablycylindrical container with a cross-section of radial symmetry in whichthere is provided a loose frame for bars on which the yarn may be hung,the said apparatus being provided with means for circulating the dye, ch a r a c t e r i z e d in that the yarn bars are formed as circleinvolutes and placed on the frame for the bars in such manner as toextend from the center of the container towards the container wall.

2.Anapparatusasclaimedinclaim l,characterized in that the bars are onlyattached to the frame at the end which is pointing towards the centralpart of the apparatus.

3.Anapparatusasclaimedinclaim2,characterized in that the bars arepivotally attached to the frame.

4.Anapparatusasclaimedinclaim l,characterized in that the bars aredetachable.

1. An apparatus for dyeing skeins of yarn, consisting of a preferablycylindrical container with a cross-section of radial symmetry in whichthere is provided a loose frame for bars on which the yarn may be hung,the said apparatus being provided with means for circulating the dye, ch a r a c t e r i z e d in that the yarn bars are formed as circleinvolutes and placed on the frame for the bars in such manner as toextend from the center of the container towards the container wall. 2.An apparatus as claimed in claim 1, c h a r a c t e r i z e d in thatthe bars are only attached to the frame at the end which is pointingtowards the central part of the apparatus.
 3. An apparatus as claimed inclaim 2, c h a r a c t e r i z e d in that the bars are pivotallyattached to the frame.
 4. An apparatus as claimed in claim 1, c h a r ac t e r i z e d in that the bars are detachable.